Flight Reliability
AS 1200 · Alaska Airlines
Seattle → San Jose (SEA–SJC)
81
Pretty Reliable
WanderNerd Reliability Score
- 80%
- Arrive within 15 minutes
- 10 min
- Average arrival delay
- 1.7%
- Cancelled
- 3 min early
- Median arrival delay
Based on 118 historical flights. Data through May 2026.
What the data says
Saturdays have been rough.
AS 1200 arrived on time 93% of the time on Wednesdays and just 68% on Saturdays. That gap is worth planning around.
The breakdown
- Mon93%(14 flights)
- Tue73%(15 flights)
- Wed93%(15 flights)
- Thu93%(14 flights)
- Fri75%(20 flights)
- Sat68%(19 flights)
- Sun74%(19 flights)
83%
Oct
Jul 65% → Oct 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| July 2025 | 65% | 23 |
| August 2025 | 84% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 83% | 24 |
- Departures on time
- 78%
- Diverted
- 0%
- Flights flown
- 116
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 118 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.